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How Useful Is This UV Source?

 
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Author Previous TopicReplies: 9 / Views: 282Next Topic  
Pillar Of The Community
Israel
604 Posts
Posted 01/22/2021   4:21 pm  Show Profile Bookmark this topic Add Rob Roy to your friends list Get a Link to this Message



I used such a magnifier, and now ordered this one with built-in UV light.
Does anyone know what limit it might have in examining fluorescent stamps, and in general, why use philatelic dedicated UV lamps?
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8949 Posts
Posted 01/22/2021   4:40 pm  Show Profile Check 51studebaker's eBay Listings Bookmark this reply Add 51studebaker to your friends list  Get a Link to this Reply
More info here
https://stampsmarter.org/features/T...ng_Home.html
See section named "Types of UV Light"
Don
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Pillar Of The Community
United States
7231 Posts
Posted 01/22/2021   4:46 pm  Show Profile Bookmark this reply Add Petert4522 to your friends list  Get a Link to this Reply
The dedicated ones work better on specific work. If using a UV light to see if there is tagging I suppose any "blacklight" will do, but if you really dig into specifics a dedicated unit is a must. Also in my experience the best thing to use is an AC powered unit. Battery units work OK with fresh batteries but go down fast when batteries age. Rechargable batteries do not seem to work good.


Peter
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Edited by Petert4522 - 01/22/2021 4:46 pm
Pillar Of The Community
United States
1825 Posts
Posted 01/22/2021   5:07 pm  Show Profile Bookmark this reply Add shermae to your friends list  Get a Link to this Reply
I've used this one for several years with good results.




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Pillar Of The Community
Israel
604 Posts
Posted 01/22/2021   5:18 pm  Show Profile Bookmark this reply Add Rob Roy to your friends list  Get a Link to this Reply
Since I am not a specialist, I guess any UV source will do.
My main need is when there is the same stamp with and without luminescence. So far I witnessed it significantly in GB machines and West German definitives.
Here's another lamp, for a wider surface. the description says "3W LED UV Resin Curing Lamp 395NW UV". An advantage of this lamp and the previous one - they cost only a few dollars.
Is there a list of countries that use this feature?
Shermae, it looks good, how much did it cost?



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Edited by Rob Roy - 01/22/2021 5:30 pm
Pillar Of The Community
United States
1825 Posts
Posted 01/22/2021   5:32 pm  Show Profile Bookmark this reply Add shermae to your friends list  Get a Link to this Reply
Rob I think I paid about $50
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Pillar Of The Community
Israel
604 Posts
Posted 01/23/2021   8:06 pm  Show Profile Bookmark this reply Add Rob Roy to your friends list  Get a Link to this Reply
Is there an online list of countries that use this luminescence feature?
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United States
153 Posts
Posted 01/23/2021   11:54 pm  Show Profile Bookmark this reply Add mstocky2 to your friends list  Get a Link to this Reply
The item you show is most likely a long wave UV source. Long wave doesn't work for tagging of US stamps but does for many foreign stamps I understand. Longwave UV also works well for luminescent ink and paper varieties. I find that LED sources don't work that well. They can be somewhat helpful at stamp shows. For home use, I find a fluorescent black light works best.
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Spain
237 Posts
Posted 01/24/2021   11:32 am  Show Profile Bookmark this reply Add Roberto59 to your friends list  Get a Link to this Reply
Hello.
I do not know well the American stamps, for all I use a note detector at home ( 12 $) and another laptop for outside ( 8 $). They both have white and UV light, besides magnifying glass.
Regards.

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Canada
709 Posts
Posted 01/24/2021   11:51 am  Show Profile Bookmark this reply Add itma to your friends list  Get a Link to this Reply
Sherman:

I also use the Lighthouse uv lamp and it works well for looking at stamps. I find, however, that if you wish to photograph a stamp under uv light, it doesn't seem to have the power to illuminate the whole stamp.
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